Question

A bag has 4 green marbles, 3 white marbles, and 2 black marbles. You randomly pull a marble from the bag, put it back, and then pull out another one.What is the probability of getting a green and then a green? Write as a fraction

Answer 1

Given the following:

4 green marbles

3 white marbles

2 black marbles

Total marbles = 4 + 3 + 2

= 9

probability of picking first green =4/9

Probability of picking a green again = 4/9 (with replacement)

Therefore, the probability of getting a green and a green again is:

P = 4/9 x 4/9

p = 16/81

Therefore the probablity of getting a green and then a green again is = 16/81